DE3013462A1 - Safety circuit with several signal inputs for ammunition - uses two different criteria for safety circuit disarming in selectable timing sequence - Google Patents

Abstract

The circuit is intended for firing a missile, or a mine. It has several signal inputs and its deblocking takes place, using two different criteria in a selectable time period, e.g. provided by a launching or separation contactless sensor. The used electrical pulse of launching is defined by one or several following criteria, i.e. a given amplitude within upper and lower limits, an adjustable minimum period, a selectable time period, and a given output impedance. The circuit has an input (1) for an activation starting signal, coupled via a filter (4) and an impedance converter (5) to a monoflop (8). The latter output is connected to an input of a logic element (9). A second signal input forms a contact sensor (10), signalling the launching of the missile. The sensor is connected to a second monoflop (12) via a series-connected amplifier (11). The monoflop output is connected to a second input of the logic element.

Description

Circuit arrangement for safety circuits

The invention relates to an arrangement for safety circuits with at least two signal inputs for the ignition circuit of a projectile or one Mine etc.

For example, US Pat. No. 3,924,535 discloses a circuit arrangement became known, in which a pulse is only emitted at the output when on the input is given a first pulse with a certain polarity and at the same time a second pulse with a different polarity within a given period of time at the entrance. This arrangement can not be done with the necessary security and reliability is also transferred to the firing circuit of a projectile or mine. An exploitation of the signals from the launch and contact sensor is so far in the arrangement not done according to the prior art, it must also be mentioned that a Contact sensor in the form of a structure sensor for a so-called "conscious" launch of a floor alone is not significant.

The invention is based on the object in an arrangement of to bring about such an improvement that the previously necessary mechanical devices with the associated sealing and tolerance problems omitted and also the mechanical linch pins are dispensable, as well as the proposed one To make the principle more versatile.

This task is achieved by the measures proposed in the claims in simple and absolutely reliable Way solved. In the description an exemplary embodiment is dealt with and in the drawing in the form of a block diagram etc. shown schematically. 1 shows a general block diagram; FIG. 2 shows a block diagram of the special exemplary embodiment of a bomb lock; FIG. FIG. 3 shows a circuit arrangement of the exemplary embodiment according to FIG. 2.

The starting point of the present safety circuit function is Firing of a projectile, dropping of a bomb or mine ', or the impulse for this. This impulse shall be referred to as "conscious" impulse 1 in the following. He has an amplitude 2 and a duration 3 and reaches an input filter 4 on an impedance converter 52 which the signal for further processing accordingly strengthens, possibly also diminishes or weakens, which of the values of the the following electronic components. This "conscious" impulse can now be: the electrical impulse for starting the gas generator, which then also provides the power supply at the same time, or the electrical ignition pulse for the or the engines, but also the ignition pulse for the ejection cartridge in a bomb lock, or some other definable signal for the "conscious" departure of a combating body.

The impedance converter 5 is followed by a comparator 6, the "conscious" electrical impulse 1 evaluated for its minimum amplitude, but also the evaluation with regard to its maximum amount and the duration or also to the temporal The course of the amplitude takes place when these quantities from the electrical firing signal are defined as characteristic and significant.

If these values are now in relation to the minimum and / or maximum amplitude, the duration itself and / or the voltage or current curve corresponding to the Tolerance limits of the desired values, the triggering of the time delay device takes place 7, - which, after a period of time tl, triggers a monoflop 8, which now emits an output pulse with the duration t2 to an AND element 9.

Simultaneously with the departure of the projectile, missile, etc. is a so-called contact or separation sensor 10 is also acted upon. For this sensor Different configurations are conceivable, once as only single-pole, galvanic Contact, such as a ground contact, or a push button switch, the one Circuit closes or opens. So-called contactless, magnetic or capacitive contact sensors. These electronic sensors can easily bridge air gaps of many millimeters and have the essential Advantage that they all military environmental pollution, corrosion phenomena and aging effects have grown much better than galvanic contacts or even mechanical pressure switches. Of course, any other form of contact training and short range sensors can also be used.

The signal from the contact or disconnection sensor lo etc.

is now also a signal conditioning device in an amplifier 11 can be, reinforced or processed. This signal is now sent to a monoflop 12 given, the output pulse of which is in turn input to the AND gate 9.

Now it is essential that only if the signal of the monoflop output 12 within a time range greater than tl- and less than the time tl + t2- falls, the AND element 9 passes the pulse on to the pulse device 13.

Here, the time range t 1 is given by the delay device 7 and the time tl + t2 through the delay device 7 and the duration of the pulse of the Monoflop 8.

The pulse device 13 in turn controls different ones for safety necessary criteria, e.g. to drive a motor or an electromagnet, or both together or to control electro-explosive elements on their part Cancel safety interlocks or immediately release safety links. But also electronic safety devices that form a so-called safety chain can be controlled with the pulse device. Often used on a missile first the battery is activated and only when the battery voltage is present will the Launch signal 1 given in the missile. In this case, the correct one is also possible Activation of the battery as internal power supply in the safety circuit of the entire safety circuit. The arrows shown in Fig. 1 to the individual blocks show that the internal Power supply an additional input criterion for the safety arrangement given is.

But also through an external power supply on the one hand and use of the ignition pulse on the other hand for the activatable battery connected to the contact - respectively.

Separation sensor signal can be the proposed fuse of a safety circuit can be achieved alone.

Fig. 2 shows a simplified embodiment in a schematic representation the invention in a safety circuit for a bomb lock of aircraft. Because of above and the labeling of the individual elements used In the figure, the description of the functional process should be repeated superfluous, as well as for the block diagram of this embodiment, the is shown in FIG.

The versatility of the proposed system is already addressed and by the example of a bomb lock according to FIGS. 2 and 3 has been shown.

With clever attachment of the contact sensor in the proposed Embodiment as a non-contact contact sensor can use this principle in a Variety of different platforms, such as contact launch rails, etc. can be used.

Claims (7)

Circuit arrangement for safety circuits Patent claims arrangement for a safety circuit with at least two signal inputs in the ignition circuit on ammunition, which means that the unlocking of the Safety circuit based on two different criteria - such as firing and separation sensor takes place in a selectable time setting. 2. Arrangement according to claim a, characterized g e k e n n -z e i c h n e t that the separation sensor is a non-contact sensor. 3. Arrangement according to claim 1 or 2 characterized g e -k e n n z e i c Note that the electrical impulse of projectile launch is defined by a, several or all criteria a) a certain amplitude with upper and lower Limit, b) an adjustable minimum duration, c) a preselectable duration, d) a certain output impedance. 4. Arrangement according to claim 3, characterized in that g e k e n n -z e i c h n e t that a first signal input (1) for a signal initiating activation a filter (4) and an impedance converter (5) connected to a first monoflip (8) ists whose output is applied to an input of the Jerknüplungsgliedes (9) and that a second signal input as a signaling the departure of the bomb or the projectile Contact sensor (lo) is formed, which via a downstream amplifier (11) is applied to a second monoflop (12), the output of which is connected to a second input of the logic element (9) is connected, as well as the logic element (9) Pulse generator connected to another safety or ignition circuit (13) is downstream. 5. Arrangement according to one of the preceding claims, characterized g e It is not possible to say that there is a time delay element between the filter (4) and the monoflop (8) (7) is inserted. 6. Arrangement according to one of the preceding claims, characterized g e it is not possible to say that the first monoflop (8) has an output pulse with a certain period of time (t2). 7. Arrangement according to one of the preceding claims 1 to 5 it is noted that after the impedance converter (3) a comparator (6) is inserted.